TB-500 (Thymosin Beta-4 Fragment) — Dosing, Cycles, Half-Life & Side Effects

TB-500 (Thymosin Beta-4 Fragment) is a tissue-repair peptide with a half-life of 7 days (due to extended tissue retention). Synthetic fragment of Thymosin Beta-4, a naturally occurring protein that regulates actin and promotes cell migration, wound healing, and tissue regeneration. Primarily researched for injury recovery and tissue repair. This page is educational harm-reduction reference compiled from peer-reviewed literature — not medical advice, not an endorsement, not a recommendation to use. Consult a licensed clinician before any decision.

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Quick Facts

Class	Healing Peptides
Half-life	7 days (due to extended tissue retention)
Hepatotoxicity	None
Suppression	0/10

Typical Dosing Ranges

Common dose range: 2-5mg twice weekly (loading), then 2mg weekly (maintenance)

Cycle length: 4-8 weeks

Dose ranges are compiled from published pharmacokinetic studies and community-reported usage. Where a value is community-reported rather than clinically studied, this page and its structured data flag it. Lower end of any range is always the safer starting point.

Stacking Considerations

No structural stacking blockers. Standard harm-reduction rules apply: minimize total androgen load, minimize oral exposure, and monitor bloodwork.

PCT Requirements

Never stack two SERMs. Extend a single SERM (tamoxifen OR enclomiphene/clomiphene) rather than combining.
Use the cycle planner to generate a full protocol based on your complete stack, not this compound alone.

Side Effect Profile

Limited human clinical trial data
Not FDA approved
WADA prohibited substance
Requires injection
Expensive

Known Interactions

bpc157 + tb500
minor — synergistic
Healing peptides with complementary mechanisms.
Recommendation: Safe to combine. Often used together for injury recovery.
Monitor: None specific

Monitoring (Bloodwork & Vitals)

Comprehensive metabolic panel (baseline, mid-cycle, post-cycle)
Lipid panel (total cholesterol, HDL, LDL, triglycerides)
CBC (hemoglobin, hematocrit — watch for erythrocytosis)
Sex-hormone panel (Total T, Free T, Estradiol sensitive, SHBG, LH, FSH)
Blood pressure (weekly self-check; flag systolic >140 or diastolic >90)

Baseline bloodwork is recommended before any cycle. Discontinue if liver enzymes exceed 3× upper limit of normal or if hematocrit exceeds 54%.

Frequently Asked Questions

What is the half-life of TB-500 (Thymosin Beta-4 Fragment)?

TB-500 (Thymosin Beta-4 Fragment) has a half-life of approximately 7 days (due to extended tissue retention). This figure is used to determine injection frequency (for esters) and post-cycle clearance timing.

What is the typical dose range for TB-500 (Thymosin Beta-4 Fragment)?

Commonly reported ranges for TB-500 (Thymosin Beta-4 Fragment): 2-5mg twice weekly (loading), then 2mg weekly (maintenance). Cycle length: 4-8 weeks. These are compiled from published studies and community-reported usage — individual response varies and lower end is always preferred.

Does TB-500 (Thymosin Beta-4 Fragment) suppress natural testosterone?

TB-500 (Thymosin Beta-4 Fragment) causes minimal suppression of the HPTA axis (score 0/10). PCT may still be advisable depending on stack and duration.

What is TB-500 (Thymosin Beta-4 Fragment) typically used for?

TB-500 (Thymosin Beta-4 Fragment) is commonly used for: Injury recovery (experimental), Tissue repair, Joint and soft tissue support. Intended-use context does not imply safety — every use case carries the same underlying pharmacological risks.

Is TB-500 (Thymosin Beta-4 Fragment) legal?

TB-500 (Thymosin Beta-4 Fragment) is a controlled substance in many jurisdictions (typically Schedule III in the US when it is an anabolic androgenic steroid). StackItSmart does not provide sourcing information. Possession, import, and use without a prescription carry legal consequences that vary by country and state.

Citations

Disclaimer

StackItSmart is an independent harm-reduction reference. The content above is compiled from peer-reviewed literature and is not medical advice, not an endorsement, and not a recommendation to use TB-500 (Thymosin Beta-4 Fragment). Performance-enhancing compounds carry legal, endocrine, cardiovascular, and hepatic risks. Consult a licensed clinician before any decision. StackItSmart does not provide sourcing, procurement, or dosing prescriptions.